From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Carburettor settings for 8-cylinder and Ripple engines, detailing issues in cold weather and the proposed solution of using heated induction pipes.
| Identifier | ExFiles\Box 123\1\ scan0020 | |
| Date | 22th January 1940 | |
| -5- Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}3/MN.22.1.40. Hence the only solution is by the use of induction pipes with more heat. Pipes for 8-cyl. and Ripple engines are at present being mocked up to bring more heat to the long branches. The former will be necessary for 4.B.50 if sensible comparative idling tests are to be obtained with the different camshafts. With regard to the actual carburetter settings on the Ripple and 8-cyl. cars, in each case a carburetter has been set correctly with an outside air temp. of about 8°C. In each case carburation has become bad since the air temp. dropped to zero and below, it having become far worse on the Ripple (12.S.V.) than on the B.80 (4.B.50). In each case the carbur-etter choke size is reduced to a minimum. Thus it appears that until we have the better heated induction pipes it is little use setting carburetters, since we do not know how much, even with these, we shall have to concede in economy for those few very cold days or for the cars sold abroad. Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden} | ||